mod_authz_svn, the Apache httpd module which does path-based
authorization on Subversion repositories, is not correctly protecting
all metadata on unreadable paths.

This metadata leakage affects the mod_authz_svn module in all released
versions of Subversion (through 1.0.7), as well as the 1.1-rc1, -rc2
and -rc3 release candidates.  The leakage is fixed in the 1.0.8 and
1.1-rc4 release, as well as the upcoming 1.1 final release.


Details:
=======

If a Subversion commit affects paths that an administrator has marked
"unreadable" using mod_authz_svn, then

   - "svn log -v" will list the existence of the unreadable paths;
   - "svn log -v" will show the commit's log message, which might be
                  considered sensitive metadata in some situations;
   - "svn propget" is also able to fetch the log message of any commit;
   - "svn blame" and other commands that follow renames are able to
                  acknowledge the existence of earlier versions of
                  files that exist at unreadable locations.